Realization of fault ride through for doubly fed induction generator system with cascade converter,International Transactions on Electrical Energy Systems

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Realization of fault ride through for doubly fed induction generator system with cascade converter
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2021-01-20 , DOI: 10.1002/2050-7038.12792
Zakiud Din ₁ , Jianzhong Zhang ₁ , Zheng Xu ₁ , Yaqian Zhang ₁ , Jin Zhao ₁

Affiliation

The doubly fed induction generator (DFIG) system is prevalent in the wind power industry due to cost‐effective variable speed operation and part size power converter. The DFIG system dynamic performance might be degraded by oscillations of the electromagnetic torque and instantaneous stator power under grid faults. This paper proposes an improved method to augment the dynamic performance of the DFIG system under the aforesaid scenarios, where an additional cascade converter (CC) is serially connected at Y‐point of DFIG stator windings. The DFIG performance under low‐voltage ride through (LVRT) and high‐voltage ride through (HVRT) is improved with the proposed control topology. Additionally, with auxiliary control provision, the proposed method can improve the stability of the DFIG system. The theoretical analysis and Matlab/Simulink simulations validate the effectiveness of the proposed method.

中文翻译：

带级联变换器的双馈感应发电机系统故障穿越的实现

双馈感应发电机（DFIG）系统由于具有成本效益的变速运行和部件尺寸功率转换器而在风电行业中十分普遍。在电网故障下，电磁转矩和瞬时定子功率的振荡可能会降低DFIG系统的动态性能。本文提出了一种在上述情况下增强DFIG系统动态性能的改进方法，其中在DFIG定子绕组的Y点处串联了一个附加的级联转换器（CC）。所提出的控制拓扑改善了低压穿越（LVRT）和高压穿越（HVRT）下的DFIG性能。另外，通过提供辅助控制，所提出的方法可以提高DFIG系统的稳定性。

更新日期：2021-03-02

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